<template>
  <el-container class="home-container">
    <el-header>
      <div>
        <img src="@/assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="iscolloapse ? '56px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          :unique-opened="true"
          :collapse="iscolloapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            class="el-submenustyle"
            :index="item.id + ''"
            v-for="item in menulist"
            :key="item.id"
          >
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单区域 -->
            <el-menu-item
              :index="'/' + subItem.path + ''"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavSate('/' + subItem.path + '')"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data() {
    return {
      menulist: [],
      iconObj: {
        125: 'iconfont iconuser',
        103: 'iconfont icontijikongjian',
        101: 'iconfont iconshangpin',
        102: 'iconfont icondanju',
        145: 'iconfont icondanju',
      },
      //是否折叠
      iscolloapse: false,
      activePath: '', 
    }
  },
  created() {
    this.getMenuList()
    // this.activePath = window.sessionStorage.getMenuList('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },

    //获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      else this.menulist = res.data
    },

    //点击按钮， 切换菜单的折叠和展开
    toggleCollapse() {
      this.iscolloapse = !this.iscolloapse
    },

    //保存链接的激活状态
    saveNavSate(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  },
}
</script>

<style lang="less" scoped>
body > .el-container {
  margin-bottom: 40px;
}
.el-header {
  background-color: #333744;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #ffffff;
  font-size: 20px;
}

.el-header > div {
  display: flex;
  align-items: center;
}

.el-header > div > span {
  margin-left: 15px;
}

.el-aside {
  background-color: #333744;
}

.el-aside > .el-menu {
  border-right: none;
}

.el-main {
  background-color: #eaedf1;
}

.home-container {
  height: 100%;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2mm;
  cursor: pointer;
}
</style>